oj.uz

Submission #735107

# Submission time Handle Problem Language Result Execution time Memory
735107 2023-05-03T14:52:33 Z sandry24 Dreaming (IOI13_dreaming) C++17
32 / 100
 67 ms 15256 KB 
#include <bits/stdc++.h>
#include "dreaming.h"
using namespace std;

#pragma GCC optimize("O3,unroll-loops")
#pragma GCC target("avx2,bmi,bmi2,lzcnt,popcnt")
typedef long long ll;
typedef vector<int> vi;
typedef pair<int, int> pi;
#define pb push_back
#define mp make_pair
#define f first
#define s second

vector<vector<pi>> adj(1e5+1);
vector<bool> visited(1e5+1);
vi parent(1e5+1), dists(1e5+1);

ll maxe = -1, maxnode = -1;

void dfs(ll x, ll p=-1, ll dist=0){
    visited[x] = 1;
    parent[x] = p;
    dists[x] = dist;
    if(dist > maxe){
        maxe = dist;
        maxnode = x;
    }
    for(auto i : adj[x]){
        if(i.f != p)
            dfs(i.f, x, dist + i.s);
    }
}

int travelTime(int N, int M, int L, int A[], int B[], int T[]){
    for(int i = 0; i < M; i++){
        adj[A[i]].pb({B[i], T[i]});
        adj[B[i]].pb({A[i], T[i]});
    }
    vector<pair<ll, ll>> centers;
    for(int i = 0; i < N; i++){
        if(!visited[i]){
            maxe = -1, maxnode = -1;
            dfs(i);
            ll n1 = maxnode;
            maxe = -1, maxnode = -1;
            dfs(n1);
            ll n2 = maxnode;
            vector<pair<ll, ll>> path;
            while(n2 != n1){
                path.pb({n2, dists[n2]});
                n2 = parent[n2];
            }
            path.pb({n2, dists[n2]});
            reverse(path.begin(), path.end());
            ll diameter = path.back().second;
            ll best_node = -1, best_dist = 1e18;
            for(int j = 0; j < path.size(); j++){
                if(max(path[j].s, diameter - path[j].s) < best_dist){
                    best_node = path[j].f;
                    best_dist = max(path[j].s, diameter - path[j].s);
                }
            }
            centers.pb({best_dist, best_node});
        }
    }
    sort(centers.begin(), centers.end(), greater<pair<ll, ll>>());
    for(int i = 1; i < centers.size(); i++){
        adj[centers[0].s].pb({centers[i].s, L});
        adj[centers[i].s].pb({centers[0].s, L});
    }
    dfs(0);
    maxe = -1;
    dfs(maxnode);
    return dists[maxnode];
}

Compilation message

dreaming.cpp: In function 'int travelTime(int, int, int, int*, int*, int*)':
dreaming.cpp:58:30: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   58 |             for(int j = 0; j < path.size(); j++){
      |                            ~~^~~~~~~~~~~~~
dreaming.cpp:68:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   68 |     for(int i = 1; i < centers.size(); i++){
      |                    ~~^~~~~~~~~~~~~~~~

Subtask #1
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 51 ms 15256 KB Output is correct
2 Correct 58 ms 15224 KB Output is correct
3 Correct 36 ms 10852 KB Output is correct
4 Correct 9 ms 5256 KB Output is correct
5 Correct 8 ms 4344 KB Output is correct
6 Correct 16 ms 6136 KB Output is correct
7 Correct 2 ms 3412 KB Output is correct
8 Correct 35 ms 7360 KB Output is correct
9 Correct 46 ms 9288 KB Output is correct
10 Correct 2 ms 3540 KB Output is correct
11 Correct 62 ms 10580 KB Output is correct
12 Correct 67 ms 13376 KB Output is correct
13 Correct 2 ms 3540 KB Output is correct

Subtask #2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 3412 KB Output is correct
2 Correct 2 ms 3412 KB Output is correct
3 Correct 2 ms 3412 KB Output is correct
4 Correct 2 ms 3412 KB Output is correct
5 Correct 2 ms 3412 KB Output is correct
6 Incorrect 2 ms 3412 KB Output isn't correct
7 Halted 0 ms 0 KB -

Subtask #3
0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 51 ms 15256 KB Output is correct
2 Correct 58 ms 15224 KB Output is correct
3 Correct 36 ms 10852 KB Output is correct
4 Correct 9 ms 5256 KB Output is correct
5 Correct 8 ms 4344 KB Output is correct
6 Correct 16 ms 6136 KB Output is correct
7 Correct 2 ms 3412 KB Output is correct
8 Correct 35 ms 7360 KB Output is correct
9 Correct 46 ms 9288 KB Output is correct
10 Correct 2 ms 3540 KB Output is correct
11 Correct 62 ms 10580 KB Output is correct
12 Correct 67 ms 13376 KB Output is correct
13 Correct 2 ms 3540 KB Output is correct
14 Correct 3 ms 3412 KB Output is correct
15 Correct 2 ms 3412 KB Output is correct
16 Correct 2 ms 3412 KB Output is correct
17 Correct 2 ms 3412 KB Output is correct
18 Correct 2 ms 3412 KB Output is correct
19 Incorrect 2 ms 3412 KB Output isn't correct
20 Halted 0 ms 0 KB -

Subtask #4
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 39 ms 8168 KB Output is correct
2 Correct 39 ms 8128 KB Output is correct
3 Correct 42 ms 8168 KB Output is correct
4 Correct 38 ms 8220 KB Output is correct
5 Correct 38 ms 8104 KB Output is correct
6 Correct 45 ms 8984 KB Output is correct
7 Correct 44 ms 8392 KB Output is correct
8 Correct 49 ms 8160 KB Output is correct
9 Correct 43 ms 8004 KB Output is correct
10 Correct 40 ms 8296 KB Output is correct
11 Correct 2 ms 3412 KB Output is correct
12 Correct 20 ms 8892 KB Output is correct
13 Correct 19 ms 8916 KB Output is correct
14 Correct 18 ms 8900 KB Output is correct
15 Correct 20 ms 8900 KB Output is correct
16 Correct 20 ms 8908 KB Output is correct
17 Correct 18 ms 8900 KB Output is correct
18 Correct 27 ms 8840 KB Output is correct
19 Correct 21 ms 8888 KB Output is correct
20 Correct 2 ms 3412 KB Output is correct
21 Correct 2 ms 3412 KB Output is correct
22 Correct 3 ms 3552 KB Output is correct
23 Correct 20 ms 8900 KB Output is correct

Subtask #5
0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 3412 KB Output is correct
2 Correct 2 ms 3412 KB Output is correct
3 Correct 2 ms 3412 KB Output is correct
4 Correct 2 ms 3412 KB Output is correct
5 Correct 2 ms 3412 KB Output is correct
6 Incorrect 2 ms 3412 KB Output isn't correct
7 Halted 0 ms 0 KB -

Subtask #6
0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 51 ms 15256 KB Output is correct
2 Correct 58 ms 15224 KB Output is correct
3 Correct 36 ms 10852 KB Output is correct
4 Correct 9 ms 5256 KB Output is correct
5 Correct 8 ms 4344 KB Output is correct
6 Correct 16 ms 6136 KB Output is correct
7 Correct 2 ms 3412 KB Output is correct
8 Correct 35 ms 7360 KB Output is correct
9 Correct 46 ms 9288 KB Output is correct
10 Correct 2 ms 3540 KB Output is correct
11 Correct 62 ms 10580 KB Output is correct
12 Correct 67 ms 13376 KB Output is correct
13 Correct 2 ms 3540 KB Output is correct
14 Correct 3 ms 3412 KB Output is correct
15 Correct 2 ms 3412 KB Output is correct
16 Correct 2 ms 3412 KB Output is correct
17 Correct 2 ms 3412 KB Output is correct
18 Correct 2 ms 3412 KB Output is correct
19 Incorrect 2 ms 3412 KB Output isn't correct
20 Halted 0 ms 0 KB -